Limited experience on a coach but...The GY670RVs we had previously made the coach sway and rode rough. We replaced them with the latest Michelins 275x80x22.5 steer tires. Pardon me for not remembering the name of the tire. It has the green stamp on it and has orange oil.
One tire took 1 oz to balance on a road force balancer. The other tire took O nada. The ride is far improved and sway or squirm is way reduced.
I was impressed that such large tires balanced with so little weight.
no doubt the molds are new and quality control tight.

Tires are the cheapest insurance one can buy for their RV and the better tires will last longer on the crummy roads that we all drive on these days. I have Michelin XPS Ribs on my RV and think they were a good deal and I don't even remember what they cost.

I just put 255 70 22.5 Kellys on mine. 6 for $1890 and I sold my old Hankooks for $125 each (5, kept one for a spare) So it ended up costing me $1275 out of pocket for new tires. I have only driven them 700mi but they seem great as were the Hankooks---they just got old.

It is amazing that folks spend MANY thousands on their motor homes but are unwilling to spend what is needed to insure they have the best for it in the most critical components. I also have Michelin XPS ribs and have replaced them twice with the same tires. They cost more for a reason and they are worth every penny. This is especially true when I am tooling down the road in my 10 ton box with my loved ones. Good luck to you.

IMHO there are 7-8 brands of approx equal quality that make tires for RVs. I do not agree that if you do not buy Michelin you are sacrificing safety. I do think that truck tires are more reliable than the Michelin and Goodyear tires made specifically for RVs. I would feel very comfortable with any of these brands; Michelin, Goodyear, Firestone, BF Goodrich, Bridgestone, Hankook, Yokohama, or Toyo. And there are likely a bunch more good brands.